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1 | /** @file\r |
2 | UEFI Debug Library that sends messages to EFI_DEBUGPORT_PROTOCOL.Write.\r | |
3 | \r | |
4 | Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials \r | |
6 | are licensed and made available under the terms and conditions of the BSD License \r | |
7 | which accompanies this distribution. The full text of the license may be found at \r | |
8 | http://opensource.org/licenses/bsd-license.php. \r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include <Uefi.h>\r | |
16 | \r | |
17 | #include <Library/DebugLib.h>\r | |
18 | #include <Library/UefiBootServicesTableLib.h>\r | |
19 | #include <Library/PrintLib.h>\r | |
20 | #include <Library/PcdLib.h>\r | |
21 | #include <Library/BaseLib.h>\r | |
22 | #include <Library/BaseMemoryLib.h>\r | |
23 | #include <Library/DebugPrintErrorLevelLib.h>\r | |
24 | \r | |
25 | #include <Protocol/DebugPort.h>\r | |
26 | \r | |
27 | //\r | |
28 | // Define the maximum debug and assert message length that this library supports \r | |
29 | //\r | |
30 | #define MAX_DEBUG_MESSAGE_LENGTH 0x100\r | |
31 | \r | |
32 | //\r | |
33 | // Define the timeout for EFI_DEBUGPORT_PROTOCOL.Write \r | |
34 | //\r | |
35 | #define WRITE_TIMEOUT 1000\r | |
36 | \r | |
37 | \r | |
38 | EFI_DEBUGPORT_PROTOCOL *mDebugPort = NULL;\r | |
39 | \r | |
40 | /**\r | |
41 | Send message to DebugPort Protocol.\r | |
42 | \r | |
43 | If mDebugPort is NULL, i.e. EFI_DEBUGPORT_PROTOCOL is not located,\r | |
44 | EFI_DEBUGPORT_PROTOCOL is located first.\r | |
45 | Then, Buffer is sent via EFI_DEBUGPORT_PROTOCOL.Write.\r | |
46 | \r | |
47 | @param Buffer The message to be sent.\r | |
48 | @param BufferLength The byte length of Buffer.\r | |
49 | **/\r | |
50 | VOID\r | |
51 | UefiDebugLibDebugPortProtocolWrite (\r | |
52 | IN CONST CHAR8 *Buffer,\r | |
53 | IN UINTN BufferLength\r | |
54 | )\r | |
55 | {\r | |
56 | UINTN Length;\r | |
57 | EFI_STATUS Status;\r | |
58 | \r | |
59 | //\r | |
60 | // If mDebugPort is NULL, initialize first.\r | |
61 | //\r | |
62 | if (mDebugPort == NULL) {\r | |
63 | Status = gBS->LocateProtocol (&gEfiDebugPortProtocolGuid, NULL, (VOID **)&mDebugPort);\r | |
64 | if (EFI_ERROR (Status)) {\r | |
65 | return;\r | |
66 | }\r | |
67 | \r | |
68 | mDebugPort->Reset (mDebugPort);\r | |
69 | }\r | |
70 | \r | |
71 | //\r | |
72 | // EFI_DEBUGPORT_PROTOCOL.Write is called until all message is sent.\r | |
73 | //\r | |
74 | while (BufferLength > 0) {\r | |
75 | Length = BufferLength;\r | |
76 | \r | |
77 | Status = mDebugPort->Write (mDebugPort, WRITE_TIMEOUT, &Length, (VOID *) Buffer);\r | |
78 | if (EFI_ERROR (Status) || BufferLength < Length) {\r | |
79 | break;\r | |
80 | }\r | |
81 | \r | |
82 | Buffer += Length;\r | |
83 | BufferLength -= Length;\r | |
84 | }\r | |
85 | }\r | |
86 | \r | |
87 | /**\r | |
88 | Prints a debug message to the debug output device if the specified error level is enabled.\r | |
89 | \r | |
90 | If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function \r | |
91 | GetDebugPrintErrorLevel (), then print the message specified by Format and the \r | |
92 | associated variable argument list to the debug output device.\r | |
93 | \r | |
94 | If Format is NULL, then ASSERT().\r | |
95 | \r | |
96 | @param ErrorLevel The error level of the debug message.\r | |
97 | @param Format Format string for the debug message to print.\r | |
98 | @param ... A variable argument list whose contents are accessed \r | |
99 | based on the format string specified by Format.\r | |
100 | \r | |
101 | **/\r | |
102 | VOID\r | |
103 | EFIAPI\r | |
104 | DebugPrint (\r | |
105 | IN UINTN ErrorLevel,\r | |
106 | IN CONST CHAR8 *Format,\r | |
107 | ...\r | |
108 | )\r | |
109 | {\r | |
110 | CHAR8 Buffer[MAX_DEBUG_MESSAGE_LENGTH];\r | |
111 | VA_LIST Marker;\r | |
112 | \r | |
113 | //\r | |
114 | // If Format is NULL, then ASSERT().\r | |
115 | //\r | |
116 | ASSERT (Format != NULL);\r | |
117 | \r | |
118 | //\r | |
119 | // Check driver debug mask value and global mask\r | |
120 | //\r | |
121 | if ((ErrorLevel & GetDebugPrintErrorLevel ()) == 0) {\r | |
122 | return;\r | |
123 | }\r | |
124 | \r | |
125 | //\r | |
126 | // Convert the DEBUG() message to an ASCII String\r | |
127 | //\r | |
128 | VA_START (Marker, Format);\r | |
129 | AsciiVSPrint (Buffer, sizeof (Buffer), Format, Marker);\r | |
130 | VA_END (Marker);\r | |
131 | \r | |
132 | //\r | |
133 | // Send the print string to EFI_DEBUGPORT_PROTOCOL.Write.\r | |
134 | //\r | |
135 | UefiDebugLibDebugPortProtocolWrite (Buffer, AsciiStrLen (Buffer));\r | |
136 | }\r | |
137 | \r | |
138 | \r | |
139 | /**\r | |
140 | Prints an assert message containing a filename, line number, and description. \r | |
141 | This may be followed by a breakpoint or a dead loop.\r | |
142 | \r | |
143 | Print a message of the form "ASSERT <FileName>(<LineNumber>): <Description>\n"\r | |
144 | to the debug output device. If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of \r | |
145 | PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if \r | |
146 | DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then \r | |
147 | CpuDeadLoop() is called. If neither of these bits are set, then this function \r | |
148 | returns immediately after the message is printed to the debug output device.\r | |
149 | DebugAssert() must actively prevent recursion. If DebugAssert() is called while\r | |
150 | processing another DebugAssert(), then DebugAssert() must return immediately.\r | |
151 | \r | |
152 | If FileName is NULL, then a <FileName> string of "(NULL) Filename" is printed.\r | |
153 | If Description is NULL, then a <Description> string of "(NULL) Description" is printed.\r | |
154 | \r | |
155 | @param FileName The pointer to the name of the source file that generated \r | |
156 | the assert condition.\r | |
157 | @param LineNumber The line number in the source file that generated the \r | |
158 | assert condition\r | |
159 | @param Description The pointer to the description of the assert condition.\r | |
160 | \r | |
161 | **/\r | |
162 | VOID\r | |
163 | EFIAPI\r | |
164 | DebugAssert (\r | |
165 | IN CONST CHAR8 *FileName,\r | |
166 | IN UINTN LineNumber,\r | |
167 | IN CONST CHAR8 *Description\r | |
168 | )\r | |
169 | {\r | |
170 | CHAR8 Buffer[MAX_DEBUG_MESSAGE_LENGTH];\r | |
171 | \r | |
172 | //\r | |
173 | // Generate the ASSERT() message in ASCII format\r | |
174 | //\r | |
175 | AsciiSPrint (\r | |
176 | Buffer, \r | |
177 | sizeof (Buffer), \r | |
aa0a5149 BA |
178 | "ASSERT [%a] %a(%d): %a\n",\r |
179 | gEfiCallerBaseName,\r | |
b29910d6 MM |
180 | FileName, \r |
181 | LineNumber, \r | |
182 | Description\r | |
183 | );\r | |
184 | \r | |
185 | //\r | |
186 | // Send the print string to EFI_DEBUGPORT_PROTOCOL.Write.\r | |
187 | //\r | |
188 | UefiDebugLibDebugPortProtocolWrite (Buffer, AsciiStrLen (Buffer));\r | |
189 | \r | |
190 | //\r | |
191 | // Generate a Breakpoint, DeadLoop, or NOP based on PCD settings\r | |
192 | //\r | |
193 | if ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED) != 0) {\r | |
194 | CpuBreakpoint ();\r | |
195 | } else if ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED) != 0) {\r | |
196 | CpuDeadLoop ();\r | |
197 | }\r | |
198 | }\r | |
199 | \r | |
200 | \r | |
201 | /**\r | |
202 | Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer.\r | |
203 | \r | |
204 | This function fills Length bytes of Buffer with the value specified by \r | |
205 | PcdDebugClearMemoryValue, and returns Buffer.\r | |
206 | \r | |
207 | If Buffer is NULL, then ASSERT().\r | |
208 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). \r | |
209 | \r | |
210 | @param Buffer The pointer to the target buffer to be filled with PcdDebugClearMemoryValue.\r | |
211 | @param Length The number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue. \r | |
212 | \r | |
213 | @return Buffer The pointer to the target buffer filled with PcdDebugClearMemoryValue.\r | |
214 | \r | |
215 | **/\r | |
216 | VOID *\r | |
217 | EFIAPI\r | |
218 | DebugClearMemory (\r | |
219 | OUT VOID *Buffer,\r | |
220 | IN UINTN Length\r | |
221 | )\r | |
222 | {\r | |
223 | //\r | |
224 | // If Buffer is NULL, then ASSERT().\r | |
225 | //\r | |
226 | ASSERT (Buffer != NULL);\r | |
227 | \r | |
228 | //\r | |
229 | // SetMem() checks for the the ASSERT() condition on Length and returns Buffer\r | |
230 | //\r | |
231 | return SetMem (Buffer, Length, PcdGet8(PcdDebugClearMemoryValue));\r | |
232 | }\r | |
233 | \r | |
234 | \r | |
235 | /**\r | |
236 | Returns TRUE if ASSERT() macros are enabled.\r | |
237 | \r | |
238 | This function returns TRUE if the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of \r | |
239 | PcdDebugProperyMask is set. Otherwise FALSE is returned.\r | |
240 | \r | |
241 | @retval TRUE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set.\r | |
242 | @retval FALSE The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is clear.\r | |
243 | \r | |
244 | **/\r | |
245 | BOOLEAN\r | |
246 | EFIAPI\r | |
247 | DebugAssertEnabled (\r | |
248 | VOID\r | |
249 | )\r | |
250 | {\r | |
251 | return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED) != 0);\r | |
252 | }\r | |
253 | \r | |
254 | \r | |
255 | /** \r | |
256 | Returns TRUE if DEBUG() macros are enabled.\r | |
257 | \r | |
258 | This function returns TRUE if the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of \r | |
259 | PcdDebugProperyMask is set. Otherwise FALSE is returned.\r | |
260 | \r | |
261 | @retval TRUE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set.\r | |
262 | @retval FALSE The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is clear.\r | |
263 | \r | |
264 | **/\r | |
265 | BOOLEAN\r | |
266 | EFIAPI\r | |
267 | DebugPrintEnabled (\r | |
268 | VOID\r | |
269 | )\r | |
270 | {\r | |
271 | return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_PRINT_ENABLED) != 0);\r | |
272 | }\r | |
273 | \r | |
274 | \r | |
275 | /** \r | |
276 | Returns TRUE if DEBUG_CODE() macros are enabled.\r | |
277 | \r | |
278 | This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of \r | |
279 | PcdDebugProperyMask is set. Otherwise FALSE is returned.\r | |
280 | \r | |
281 | @retval TRUE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set.\r | |
282 | @retval FALSE The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is clear.\r | |
283 | \r | |
284 | **/\r | |
285 | BOOLEAN\r | |
286 | EFIAPI\r | |
287 | DebugCodeEnabled (\r | |
288 | VOID\r | |
289 | )\r | |
290 | {\r | |
291 | return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_CODE_ENABLED) != 0);\r | |
292 | }\r | |
293 | \r | |
294 | \r | |
295 | /** \r | |
296 | Returns TRUE if DEBUG_CLEAR_MEMORY() macro is enabled.\r | |
297 | \r | |
298 | This function returns TRUE if the DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of \r | |
299 | PcdDebugProperyMask is set. Otherwise FALSE is returned.\r | |
300 | \r | |
301 | @retval TRUE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set.\r | |
302 | @retval FALSE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear.\r | |
303 | \r | |
304 | **/\r | |
305 | BOOLEAN\r | |
306 | EFIAPI\r | |
307 | DebugClearMemoryEnabled (\r | |
308 | VOID\r | |
309 | )\r | |
310 | {\r | |
311 | return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED) != 0);\r | |
312 | }\r | |
313 | \r | |
314 | /**\r | |
315 | Returns TRUE if any one of the bit is set both in ErrorLevel and PcdFixedDebugPrintErrorLevel.\r | |
316 | \r | |
317 | This function compares the bit mask of ErrorLevel and PcdFixedDebugPrintErrorLevel.\r | |
318 | \r | |
319 | @retval TRUE Current ErrorLevel is supported.\r | |
320 | @retval FALSE Current ErrorLevel is not supported.\r | |
321 | \r | |
322 | **/\r | |
323 | BOOLEAN\r | |
324 | EFIAPI\r | |
325 | DebugPrintLevelEnabled (\r | |
326 | IN CONST UINTN ErrorLevel\r | |
327 | )\r | |
328 | {\r | |
329 | return (BOOLEAN) ((ErrorLevel & PcdGet32(PcdFixedDebugPrintErrorLevel)) != 0);\r | |
330 | }\r | |
50e7d3d9 | 331 | \r |